Post by: AJP on August 20, 2016, 01:09:58 pm
http://www.mk5golfgti.co.uk/forum/index.php?topic=108462.msg1050359.msg#1050359
I'm going to pull the plugs tomorrow, hopefully. Assuming I can get hold of a set of plugs before then - Bosch 101 905 631H or NGK BKR7EIX (they're the right part numbers aren't they?)
Will they need gapping, and to what? I think I've read that the NGK plugs come already gapped, but for a standard car? Car is Stage 2 k03.
Post by: rich83 on August 20, 2016, 01:18:27 pm
Post by: AJP on August 20, 2016, 01:25:46 pm
No. Just throw them in. :happy2:Ta mate. I've got a feeling new plugs will cure the symptom rather than the cause, but we'll see!
Post by: bonelorry on August 20, 2016, 01:59:01 pm
As said just throw them in, They are pre-gapped and if you try to re-gap them you can break off the Iridium coating!
Post by: AJP on August 20, 2016, 02:07:09 pm
However, it says PLATINUM on the box. Not... iridium. F*cks sake. Should I be taking them back or will they work?!
Post by: bonelorry on August 20, 2016, 02:20:04 pm
Ok, just been trawling local places for the NGKs and got some BKR7EVX. They said they were superseded by the BKR7EIX but are the same. Just bought them, not really thinking.
However, it says PLATINUM on the box. Not... iridium. F*cks sake. Should I be taking them back or will they work?!
I would not fit them personally, The EVX was discontinued quite a few Years back! They will probably be OK as they are the same fitment but....
Post by: AJP on August 20, 2016, 02:20:33 pm
Post by: bonelorry on August 20, 2016, 02:24:12 pm
I'm taking them back right now
Ideally NGK BKR7EIX which are the Iridium's OR NGK PFR7S8EG which is the correct OEM Platinum plug that you would buy from TPS etc :happy2:
Just so you have a choice.
Post by: AJP on August 20, 2016, 02:40:45 pm
Fingers crossed I make some sort of progress tomorrow.
Post by: fab5freddy on August 20, 2016, 03:55:36 pm
No. Just throw them in. :happy2:Ta mate. I've got a feeling new plugs will cure the symptom rather than the cause, but we'll see!
This is exactly what happened to me @AJP (http://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=11926) I changed the plugs on cylinder 3 twice and cured my symptoms, 2 weeks driving, all fine and then the misfires were back.
Not to be alarmist, but ultimately I believe it was what caused the death of my engine and why I now I run a CDL. Pistons ring had melted, which I think is down to the dodgy injector
Just be careful you don't fall into the same trap, thinking it's all sorted and behind the scenes your causing unknown damage
Post by: AJP on August 20, 2016, 04:28:12 pm
I'm definitely going to get it properly checked at Statller's as soon as I can get it in, regardless of what I find with the condition of the existing plugs and how it runs with new plugs.No. Just throw them in. :happy2:Ta mate. I've got a feeling new plugs will cure the symptom rather than the cause, but we'll see!
This is exactly what happened to me @AJP (http://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=11926) I changed the plugs on cylinder 3 twice and cured my symptoms, 2 weeks driving, all fine and then the misfires were back.
Not to be alarmist, but ultimately I believe it was what caused the death of my engine and why I now I run a CDL. Pistons ring had melted, which I think is down to the dodgy injector
Just be careful you don't fall into the same trap, thinking it's all sorted and behind the scenes your causing unknown damage
Strangely it ran really nicely for a day when I put the new R8 coils in. Then of course it misfired again.
So the process of pulling the old coils and fitting the new ones 'fixed' it temporarily. Now I'm asking myself if something is killing my coilpack(s). Can a bad plug kill a coil?
Or, like you say, there's more going on. I know the valve cover is a bit leaky, and as you can see in the photo in the other thread there's a bit of oil on the bolt near cylinder 2. But is it feasible that enough oil is getting down there to foul things?
I'm not ruling out an injector. Did you say your failed injector drenched the plug in fuel?
Post by: fab5freddy on August 20, 2016, 04:59:49 pm
For me i had just done the Ko4 conversion 6 weeks previously and the S3 injectors i had fitted were brand new, it didn't even cross my mind at that stage it was an injector at fault.
It could very well be feasible, only closer inspection will tell i suppose.
Yes, the last time i pulled the plug before taking it in to the garage, it was soaked in fuel, i don't remember it being that bad the couple of times previously, again hindsight shows the injectors was probably getting worse?
Only sharing my experience and you'd be well advised to keep an open mind as with these things it could be any number of different issues, hope you get to the bottom of it soon dude :happy2:
Post by: AJP on August 20, 2016, 05:11:26 pm
Yes, i was "curing" the problem for a short space of time, then it was back. In a four week period, before taking it to my trusted specialist, he straight away said injectorThat must have been gutting, straight after doing the k04 conversion. And with brand new injectors?! Wow. I did read in an unrelated thread that k04 injectors are less reliable than k03 injectors, but you wouldn't expect them to be unreliable in any way if they're brand new.
For me i had just done the Ko4 conversion 6 weeks previously and the S3 injectors i had fitted were brand new, it didn't even cross my mind at that stage it was an injector at fault.
It could very well be feasible, only closer inspection will tell i suppose.
Yes, the last time i pulled the plug before taking it in to the garage, it was soaked in fuel, i don't remember it being that bad the couple of times previously, again hindsight shows the injectors was probably getting worse?
Only sharing my experience and you'd be well advised to keep an open mind as with these things it could be any number of different issues, hope you get to the bottom of it soon dude :happy2:
I don't know if the fact I had cyl 4 injector replaced a few weeks ago has any bearing on this. It shouldn't, logically, but you never know. Thinking laterally, if something caused the cyl 4 injector to fail, could the same thing have caused this cyl 2 injector to fail.
Funny that on the TFSI it's always the coil packs that get the blame when it comes to misfires, but if you scratch the surface you can find quite a few of us who have had injector faults.
I'll be over the moon if the misfire moves when I swap the plugs over. Let's see what tomorrow brings!
Post by: AJP on August 21, 2016, 11:26:07 am
Just been for a fair drive, maybe a couple of hours (yes, I probably shouldn't be driving it, but I've got things that need doing) and as expected, it misfired, struggled to get above 2500rpm etc. I can 'nanny' it, and still cruise along at 50-60mph.
But then something strange happened after about 60-70 mins driving... The misfire went away. Completely. Full power restored. I then gave it full beans and I couldn't induce one misfire.
Why would this happen?
I'll be doing the plugs in an hour or so.
Post by: fab5freddy on August 21, 2016, 12:07:17 pm
Mine did the same, toddle around fine, push the loud pedal a bit to far and it misfired. I'm sure if it is the injector this will probably be an intermittent fault, hence the running ok for a time?
Looks more and more like the injector for me, hopefully someone else might have a theory...
I don't want to railroad the thinking on this...
Post by: r5gtt on August 21, 2016, 12:15:12 pm
Ok, just been trawling local places for the NGKs and got some BKR7EVX. They said they were superseded by the BKR7EIX but are the same. Just bought them, not really thinking.They lied mate go :slap: those mo beeches up.
However, it says PLATINUM on the box. Not... iridium. F*cks sake. Should I be taking them back or will they work?!
Post by: Namsgti on August 21, 2016, 12:28:18 pm
With the original plugs no problems car started on first turn of key.
Post by: r5gtt on August 21, 2016, 01:20:40 pm
Post by: AJP on August 21, 2016, 01:28:30 pm
Borrowed my brother's OBD2 thing, expecting to see a cyl 2 misfire code, but... nothing! No codes.
It definitely misfired the day after I fitted the new coils and every day since, the only difference this time is that the engine light flashed but didn't stay illuminated. When I originally had the misfires, before I fitted the coils, the engine light flashed, stayed on, and subsequently I got the cyl 2 misfire code, which I then cleared.
So, to recap, the misfire appears to have subsided and there are no fault codes. I removed the spark plugs, and didn't find anything of concern. They all look similar and they don't look fouled: (1-4 in order from bottom to top; that's just a bit of tubing on plug 1 because the socket wouldn't grab it)
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fuploads.tapatalk-cdn.com%2F20160821%2F2910208f06344065e7ea79fb8fa9c9f5.jpg&hash=5a652c202243eac551be13e502c6fbd960fcd7db)
Here's plug 2:
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fuploads.tapatalk-cdn.com%2F20160821%2Fce374e96c20f86e7b7f5465e16b468e8.jpg&hash=26cbd733b365dbf59b6a109b9bbe70fd292fabbe)
So, back in went the same plugs, this time with 2 and 3 swapped. The plan is to drive it as much as possible to induce the misfire, then scan it, see which cylinder it is.
I've got the new plugs waiting for if and when they're needed.
So I'm a bit stumped for today. The car pulls like a train and is as smooth as it gets. No fault codes. But I know something aint right.
Post by: AJP on August 21, 2016, 01:30:07 pm
To be fair they were very good in sorting the proper plugs out on the day, and didn't charge me any extra even though they were more expensive.Ok, just been trawling local places for the NGKs and got some BKR7EVX. They said they were superseded by the BKR7EIX but are the same. Just bought them, not really thinking.They lied mate go :slap: those mo beeches up.
However, it says PLATINUM on the box. Not... iridium. F*cks sake. Should I be taking them back or will they work?!
Post by: AJP on August 21, 2016, 01:39:36 pm
They're both covering the same issue and it'd probably be more helpful to someone reading up on the issue in the future.
Post by: r5gtt on August 21, 2016, 01:52:26 pm
Update.Did you check for any hair line cracks on the insulator white part?.
Borrowed my brother's OBD2 thing, expecting to see a cyl 2 misfire code, but... nothing! No codes.
It definitely misfired the day after I fitted the new coils and every day since, the only difference this time is that the engine light flashed but didn't stay illuminated. When I originally had the misfires, before I fitted the coils, the engine light flashed, stayed on, and subsequently I got the cyl 2 misfire code, which I then cleared.
So, to recap, the misfire appears to have subsided and there are no fault codes. I removed the spark plugs, and didn't find anything of concern. They all look similar and they don't look fouled: (1-4 in order from bottom to top; that's just a bit of tubing on plug 1 because the socket wouldn't grab it)
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fuploads.tapatalk-cdn.com%2F20160821%2F2910208f06344065e7ea79fb8fa9c9f5.jpg&hash=5a652c202243eac551be13e502c6fbd960fcd7db)
Here's plug 2:
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fuploads.tapatalk-cdn.com%2F20160821%2Fce374e96c20f86e7b7f5465e16b468e8.jpg&hash=26cbd733b365dbf59b6a109b9bbe70fd292fabbe)
So, back in went the same plugs, this time with 2 and 3 swapped. The plan is to drive it as much as possible to induce the misfire, then scan it, see which cylinder it is.
I've got the new plugs waiting for if and when they're needed.
So I'm a bit stumped for today. The car pulls like a train and is as smooth as it gets. No fault codes. But I know something aint right.
Post by: AJP on August 21, 2016, 01:55:13 pm
One thing I did notice was that plug 4 was really tight compared to the other 3.
Post by: r5gtt on August 21, 2016, 01:57:38 pm
Post by: AJP on August 21, 2016, 02:02:45 pm
I think you should take them out again and have a good look around thr insulated for cracks although it'd be a continuous misfire if one was cracked.I will do. Although I agree, the intermittent nature of the misfire logically points to something other than plugs.
I guess if an injector is dying, it might work fine one day but not the other. It's just a solenoid after all.
Post by: Pesky jones on August 21, 2016, 02:18:19 pm
Post by: AJP on August 21, 2016, 02:40:17 pm
Thats wierd! It would be hard to just "leave" the problem alone (if there is one still) without knowing why. Plus if it does come back in 6 monthes you'll be annoyed you didnt fix it the first time. Can't really help much unfortunately but i think eliminating the plugs and coils is a good start.It is an odd one isn't it. I'd like to get the new plugs in, but I'd rather get it to log a misfire on the current plugs with 2 & 3 swapped so I can at least rule them out. If it misfires again on 2 then in theory it's not the plugs. So I can either leave them in (they're 2k old) or put the new ones in. Either way I can't see it making much difference if that's the case.
I'm supposed to be driving 200 odd miles to Wales at the start of September, and even if the misfire doesn't come back before then I'm not sure I'd be confident risking the drive.
Bit of a predicament!
Post by: Dan_FR on August 21, 2016, 02:41:14 pm
Post by: fab5freddy on August 21, 2016, 02:48:46 pm
Post by: Pesky jones on August 21, 2016, 04:41:10 pm
Post by: AJP on August 21, 2016, 05:01:10 pm
Where are you in the country?South Yorks/North Notts, just south of Sheffield. I've messaged Tfsi_Mike and he's kindly agreed to help with VCDS. He's not too far away so I don't mind a little drive to hopefully shed some light on the misfires.
Post by: AJP on August 22, 2016, 05:49:18 pm
Why is it tormenting me like this?!
Post by: r5gtt on August 22, 2016, 06:08:02 pm
Well, that's yet another day of driving with no misfire. Done about 30 miles, varying from rolling around at low revs to 'spirited'.. Feels bang on.It wants you to go back to stage oem :signLOL:
Why is it tormenting me like this?!
Post by: AJP on August 22, 2016, 06:13:16 pm
Joking aside, it did seem to be straight after going Stage 2 that all the problems started. Half of me is wondering if it's more fuel cuts. But I really doubt it now the Loba is in, and these are proper misfires rather than the classic fuel cut symptoms I had before.Well, that's yet another day of driving with no misfire. Done about 30 miles, varying from rolling around at low revs to 'spirited'.. Feels bang on.It wants you to go back to stage oem :signLOL:
Why is it tormenting me like this?!
I guess I'll just have to keep driving it and see what happens. As much as it seems ok, I can't risk any situation where I'd have to rely on full acceleration like overtaking, because if it did suddenly misfire again it could be pretty dangerous.
TFSI Limbo. Oh the joy.
Post by: r5gtt on August 22, 2016, 06:29:41 pm
Post by: AJP on August 22, 2016, 06:36:43 pm
Jokes aside. Yes i recall you mentioning the issue started after stage 2 so Did you fit an RS4 fuel pressure valve on as I read Niki recommends this on stage 2.I didn't fit one, as from what Steve was telling me (I could be wrong) it sounded like something that would help a little bit, rather than being essential. At the time we agreed that we'd fit one the next time the car was in. In hindsight, I wish I had, as it's one more thing eliminated from troubleshooting at the very least.
Post by: r5gtt on August 22, 2016, 06:46:39 pm
Post by: AJP on August 22, 2016, 06:58:31 pm
It's a shame you didn't have one fitted :-/ as ive got one ready to fit when doing the RFD and carbin clean this week if I get the time. it's going to be a pin but may as well get it done once it's all open. Hopefully you'll solve the mystery of the misfire.Well if it does turn out to be an injector it'll be the perfect chance to stick an RS4 valve in!
Yeah it'll be a pain, but worth it. The way I see it, do as much as you can while you've got the inlet manifold off, then you've got peace of mind and won't have to worry about pulling it to bits again.
Post by: Dan_FR on August 22, 2016, 07:39:30 pm
It's a shame you didn't have one fitted :-/ as ive got one ready to fit when doing the RFD and carbin clean this week if I get the time. it's going to be a pin but may as well get it done once it's all open. Hopefully you'll solve the mystery of the misfire.RS4 is no benefit on K03.... at all.
Post by: AJP on August 22, 2016, 08:00:39 pm
Dan, we've been there and done this in another thread. Please don't take this the wrong way, but if one of the best TFSI specialists in the country tells me 'A' and a guy on a forum (as knowledgeable as you are) tells me 'B', I know which way I'm siding.It's a shame you didn't have one fitted :-/ as ive got one ready to fit when doing the RFD and carbin clean this week if I get the time. it's going to be a pin but may as well get it done once it's all open. Hopefully you'll solve the mystery of the misfire.RS4 is no benefit on K03.... at all.
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fuploads.tapatalk-cdn.com%2F20160822%2F447bc434ea7dea53be902374f28e45ef.jpg&hash=305fa42ed97aa56e2d12ea9c83b400e52ee2bc7f)
Post by: r5gtt on August 22, 2016, 08:19:54 pm
Yeah I'd check the injectors for sure as @fab5freddy (http://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=3064) said he's engine failed because of that.It's a shame you didn't have one fitted :-/ as ive got one ready to fit when doing the RFD and carbin clean this week if I get the time. it's going to be a pin but may as well get it done once it's all open. Hopefully you'll solve the mystery of the misfire.Well if it does turn out to be an injector it'll be the perfect chance to stick an RS4 valve in!
Yeah it'll be a pain, but worth it. The way I see it, do as much as you can while you've got the inlet manifold off, then you've got peace of mind and won't have to worry about pulling it to bits again.
I'm sticking the RS4 valve in for extra measures and I don't want to have to open that f****** inlet manifold twice. :doh:
Sorry DAN_FR I donr want to take any chances in this one and if it's no benefit then at least it's in there preventing any other issues.
Post by: Dan_FR on August 22, 2016, 10:41:45 pm
But yeah I'm out. Carry on guys
Post by: r5gtt on August 23, 2016, 12:07:11 am
EDIT:
The RS4 valve Increases the max fuel system pressure before it relieves it so better to have it on a stage 2 and 2+ :wink:
@AJP (http://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=11926)
Someone sent me this.
Like i said, stock handles 130 then opens to relieve pressure, but if you want to have a good amount of torque, you'll need the rs4 valve. When tuned, you may feel flat spots if you don't as most tunes request 130-133bar of fuel. Where as stock requests 127-130bar of fuel. Stock is really on the limit, but your tuner can decrease and tune around this for same peak Hp in the higher rev range.
Post by: r5gtt on August 25, 2016, 02:25:43 am
Fuel is needed for tuning, the oem pumps cannot cope in the torque band and drop pressure and max out the injection angles.. a pump is 100% needed to run stage2+ torque numbers for sure. Both k03 and k04. And to add to this, i dont sell pumps i just tune them. I can do strong map non pump but at a compromise to the torque band. Same with every tuner i know
Valves are needed to give a min of 5bar head room to stop the valve opening. The valves come in hand to aid the pressures demands at stage 2+ when look at 350lbft+ and 130bar pressures... 3
Post by: AJP on August 25, 2016, 11:22:26 am
I called in to Statller yesterday for a chat with Steve and managed to get booked in... for the end of September! So in the meantime all being well I'll be doing some data logging tomorrow with @Tfsi_Mike.
Engine is still running very nicely.
Post by: r5gtt on August 25, 2016, 02:32:58 pm
Post by: AJP on August 25, 2016, 03:11:45 pm
That's good to know your cars running well now for whatever reason it is. Shane you don't know why it's messing around and misfiring at other times. :thinking:Yeah I'm half hoping it plays up before or while it's plugged in tomorrow so we can at least get some idea of what's failing. Otherwise it's just a waiting game.
Post by: r5gtt on August 25, 2016, 03:26:35 pm
Post by: pudding on August 25, 2016, 04:54:08 pm
I caught mine early though and was just a hiccup going into boost, not a full on stutter like yours does/did. I replaced all 4 as I'm not going in there again!
It misfired at idle (intermittently) too, but it was a proper and continuous misfire, not a general lumpiness that these engines can sometimes have.
When it started misfiring at 2,500rpm, could you drive through it? Or did pushing the pedal more not increase acceleration, or slow it down? Just asking as I've seen that happen from a blocked cat before. Can't remember what exhaust you've got on yours!
I could drive through the stutter on mine, so the injector was kind of working better with a higher duty cycle. Just had a dead zone.
Keep digging, I'm sure the cause is there somewhere!
Post by: AJP on August 25, 2016, 05:17:05 pm
Keep checking for a persistent misfire in the fault codes. Injector 3 went on mine. Naturally no amount of plugs and coils thrown at it solved the problem!If I tried to drive through the misfire it'd just get worse, so I never attempted it and just backed off. The severity of it correlated with throttle - the more I dipped my toe in the heavier the misfires and the car slowed. It was a flurry of misfires (accompanied by 'pop pop pop' like a DSG burp) rather than one hiccup.
I caught mine early though and was just a hiccup going into boost, not a full on stutter like yours does/did. I replaced all 4 as I'm not going in there again!
It misfired at idle (intermittently) too, but it was a proper and continuous misfire, not a general lumpiness that these engines can sometimes have.
When it started misfiring at 2,500rpm, could you drive through it? Or did pushing the pedal more not increase acceleration, or slow it down? Just asking as I've seen that happen from a blocked cat before. Can't remember what exhaust you've got on yours!
I could drive through the stutter on mine, so the injector was kind of working better with a higher duty cycle. Just had a dead zone.
Keep digging, I'm sure the cause is there somewhere!
The exhaust is a full Powervalve with sport cat, new earlier this year. I did worry that the misfires wouldn't be doing the cat many favours!
I did have a misfire on idle a few weeks ago, this was fixed by replacing injector 4. There were no problems under load at this point.
Post by: pudding on August 26, 2016, 03:53:21 pm
Keep checking for a persistent misfire in the fault codes. Injector 3 went on mine. Naturally no amount of plugs and coils thrown at it solved the problem!If I tried to drive through the misfire it'd just get worse, so I never attempted it and just backed off. The severity of it correlated with throttle - the more I dipped my toe in the heavier the misfires and the car slowed. It was a flurry of misfires (accompanied by 'pop pop pop' like a DSG burp) rather than one hiccup.
I caught mine early though and was just a hiccup going into boost, not a full on stutter like yours does/did. I replaced all 4 as I'm not going in there again!
It misfired at idle (intermittently) too, but it was a proper and continuous misfire, not a general lumpiness that these engines can sometimes have.
When it started misfiring at 2,500rpm, could you drive through it? Or did pushing the pedal more not increase acceleration, or slow it down? Just asking as I've seen that happen from a blocked cat before. Can't remember what exhaust you've got on yours!
I could drive through the stutter on mine, so the injector was kind of working better with a higher duty cycle. Just had a dead zone.
Keep digging, I'm sure the cause is there somewhere!
The exhaust is a full Powervalve with sport cat, new earlier this year. I did worry that the misfires wouldn't be doing the cat many favours!
I did have a misfire on idle a few weeks ago, this was fixed by replacing injector 4. There were no problems under load at this point.
Sounds like it was/is going seriously lean in that case. I doubt a new aftermarket exhaust is plugged!
Any "System too lean" type fault codes?
What about the swirl flaps, can they jam shut or something? Not really sure how that works tbh, or when they switch on!
Post by: Tfsi_Mike on August 26, 2016, 05:42:39 pm
2nd column is RPM Far right is Lambda
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fk482%2Ftfsi_mike%2FScreen_Shot_2016-08-26_at_17.46.24_zpspna7jjti.png&hash=d5526d2662de727052987f111fb061126df788b4)
Post by: AJP on August 26, 2016, 07:33:00 pm
Anyway. Big thanks to Tfsi_Mike for helping out with this. Proper gent. And the Cupra is a lovely in the flesh.
As predicted, no misfires, car performed very well. Let's see if some of you with more knowledge than me can spot anything!
Post by: Tfsi_Mike on August 26, 2016, 07:37:52 pm
Great to meet you Andrew. Planned on taking the Cupra up the a52 so you could compare. Traffic seemed to be building though.
Hope you get to the bottom if it, so frustrating.
Im going to see if I can graph som elf the date, just to make it a bit more visual.
Post by: AJP on August 26, 2016, 07:47:38 pm
I'll definitely come down again some time to go out in the Cupra mate, I'd like to know what all the fuss is about with the TTE! But yeah it's probably better when there's less traffic on the road. Hope you get some progress with the gearbox.
Great to meet you Andrew. Planned on taking the Cupra up the a52 so you could compare. Traffic seemed to be building though.
Hope you get to the bottom if it, so frustrating.
Im going to see if I can graph som elf the date, just to make it a bit more visual.
That'd be great if you could get some graphs up. I might learn a bit about logging too!
Post by: Tfsi_Mike on August 26, 2016, 07:49:12 pm
Just attempting one on Excel, Im a bit rusty.
Post by: Dan_FR on August 26, 2016, 08:14:29 pm
Post by: Tfsi_Mike on August 26, 2016, 08:38:44 pm
Post by: AJP on August 26, 2016, 08:39:53 pm
Will do, if @AJP (http://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=11926) doesn't mind it shared.Not at all
Post by: Tfsi_Mike on August 26, 2016, 08:40:25 pm
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fk482%2Ftfsi_mike%2FScreen_Shot_2016-08-26_at_20.36.59_zpsmfcvq8hb.png&hash=c2ca9ca4c7ab5d52a93e9d5d5630bcd48b4af062)
Post by: Tfsi_Mike on August 26, 2016, 08:43:24 pm
https://www.dropbox.com/home/public/AJP%20LOGS/AJP%20MK5%20GTI
Post by: r5gtt on August 26, 2016, 08:51:46 pm
Post by: rich83 on August 26, 2016, 08:51:56 pm
Post by: Tfsi_Mike on August 26, 2016, 08:59:36 pm
Hmmm, it's a public folder. Try this...
https://www.dropbox.com/sh/5pszvjexjux0jfd/AAA33oIcnFQb8i29_IVunxVba?dl=0
Post by: Dan_FR on August 27, 2016, 07:52:32 am
Absolutely nothing wrong in those logs. Map looks very well suited to the car, car is very happy and nothing looks amiss. Very strong Stage 2 map making huge boost at low RPM, Lambda enriching at higher RPM when the fuel pump (aimed at standard pump as I know you have a LOBA) can keep up. Easily making and holding 120 BAR of fuel pressure with no sign of the standard 130 BAR PRV cracking early and reducing fuel pressure :wink: :happy2: :signLOL:
Seriously there is nothing wrong there at all, can only commend the map and running of the car. Whatever issue you had is not present in these logs
Post by: Tfsi_Mike on August 27, 2016, 08:58:06 am
Even looking at the values when they where live on the screen, all the demands were being met.
I wasn't sure about the injection timing, don't know what's good and what isn't.
Also couldn't remember if higher or lower lambda was rich / lean.
Post by: AJP on August 27, 2016, 09:12:31 am
So nothing's ringing alarm bells on the face of it. It's reassuring that you see it as a strong map and healthy car in general Dan. And yeah that return valve is coping fine
I'm interested to learn a bit more about timing and the AFR.
Post by: Dan_FR on August 27, 2016, 06:05:49 pm
Peaking in the 8's is ok/on the limit, 9's you can manage but want to avoid. Have seen 10's but ECU not happy, maxed out fuel trims and running lean etc.
Even looking at the values when they where live on the screen, all the demands were being met.
I wasn't sure about the injection timing, don't know what's good and what isn't.
Also couldn't remember if higher or lower lambda was rich / lean.
Lower the decimal, the richer it is. 0.9 is leaner than 0.8 etc.
Thanks Dan and Mike.
So nothing's ringing alarm bells on the face of it. It's reassuring that you see it as a strong map and healthy car in general Dan. And yeah that return valve is coping fine
I'm interested to learn a bit more about timing and the AFR.
Well the ignition timing is on the limit hence you have the small amount of timing pull that is optimum for performance. The AFR is leaner than would be ideal at lower RPM as the (standard) fuel pump cannot deliver any more than what is requested. A 'Stage 2+' map would give you a richer AFR at lower RPM as the fuel pressure would be higher, meaning more fuel delivered for the same (or similar) injection time, meaning you keep cylinder temps and EGTs cooler, and can run more ignition timing resulting in more torque/power. You always aim to go richer toward the redline anyway but by higher RPM the injection timing is back to happy levels as there is plenty of fuel available
Post by: AJP on August 27, 2016, 06:26:26 pm
So basically I should be on a 2+ map; more fuel delivered at lower rpm therefore less timing pull?Peaking in the 8's is ok/on the limit, 9's you can manage but want to avoid. Have seen 10's but ECU not happy, maxed out fuel trims and running lean etc.
Even looking at the values when they where live on the screen, all the demands were being met.
I wasn't sure about the injection timing, don't know what's good and what isn't.
Also couldn't remember if higher or lower lambda was rich / lean.
Lower the decimal, the richer it is. 0.9 is leaner than 0.8 etc.Thanks Dan and Mike.
So nothing's ringing alarm bells on the face of it. It's reassuring that you see it as a strong map and healthy car in general Dan. And yeah that return valve is coping fine
I'm interested to learn a bit more about timing and the AFR.
Well the ignition timing is on the limit hence you have the small amount of timing pull that is optimum for performance. The AFR is leaner than would be ideal at lower RPM as the (standard) fuel pump cannot deliver any more than what is requested. A 'Stage 2+' map would give you a richer AFR at lower RPM as the fuel pressure would be higher, meaning more fuel delivered for the same (or similar) injection time, meaning you keep cylinder temps and EGTs cooler, and can run more ignition timing resulting in more torque/power. You always aim to go richer toward the redline anyway but by higher RPM the injection timing is back to happy levels as there is plenty of fuel available
I'm in two minds at the minute whether to go k03 hybrid/k04, or stick with the k03. The plan, either way, was to stick with the current hardware/software setup for now, and then get the map updated to either 3 or 2+ respectively once I'd got the full works in place hardware wise. Even if I was staying with the k03 I'd like to get an upgraded intercooler and intake before I got the map revised. That's the only reason I'm still on the Stage 2 map, when I should really be on 2+, like you say.
So, would you say getting a 2+ map right now is ideal, rather than essential? And if I were to run the car just as it is for say another 6 months I wouldn't (shouldn't) have any problems?
Post by: Tfsi_Mike on August 27, 2016, 07:23:06 pm
Post by: Dan_FR on August 27, 2016, 09:14:49 pm
The car will quite happily run like this. A 2+ map would extract a little more low down, which would be nice but is certainly not essential. I'd decide on the hybrid or K04 route and leave the mapping as is until then.So basically I should be on a 2+ map; more fuel delivered at lower rpm therefore less timing pull?Peaking in the 8's is ok/on the limit, 9's you can manage but want to avoid. Have seen 10's but ECU not happy, maxed out fuel trims and running lean etc.
Even looking at the values when they where live on the screen, all the demands were being met.
I wasn't sure about the injection timing, don't know what's good and what isn't.
Also couldn't remember if higher or lower lambda was rich / lean.
Lower the decimal, the richer it is. 0.9 is leaner than 0.8 etc.Thanks Dan and Mike.
So nothing's ringing alarm bells on the face of it. It's reassuring that you see it as a strong map and healthy car in general Dan. And yeah that return valve is coping fine
I'm interested to learn a bit more about timing and the AFR.
Well the ignition timing is on the limit hence you have the small amount of timing pull that is optimum for performance. The AFR is leaner than would be ideal at lower RPM as the (standard) fuel pump cannot deliver any more than what is requested. A 'Stage 2+' map would give you a richer AFR at lower RPM as the fuel pressure would be higher, meaning more fuel delivered for the same (or similar) injection time, meaning you keep cylinder temps and EGTs cooler, and can run more ignition timing resulting in more torque/power. You always aim to go richer toward the redline anyway but by higher RPM the injection timing is back to happy levels as there is plenty of fuel available
I'm in two minds at the minute whether to go k03 hybrid/k04, or stick with the k03. The plan, either way, was to stick with the current hardware/software setup for now, and then get the map updated to either 3 or 2+ respectively once I'd got the full works in place hardware wise. Even if I was staying with the k03 I'd like to get an upgraded intercooler and intake before I got the map revised. That's the only reason I'm still on the Stage 2 map, when I should really be on 2+, like you say.
So, would you say getting a 2+ map right now is ideal, rather than essential? And if I were to run the car just as it is for say another 6 months I wouldn't (shouldn't) have any problems?
Post by: AJP on August 27, 2016, 09:15:52 pm
Will do mate. Thanks again for your inputThe car will quite happily run like this. A 2+ map would extract a little more low down, which would be nice but is certainly not essential. I'd decide on the hybrid or K04 route and leave the mapping as is until then.So basically I should be on a 2+ map; more fuel delivered at lower rpm therefore less timing pull?Peaking in the 8's is ok/on the limit, 9's you can manage but want to avoid. Have seen 10's but ECU not happy, maxed out fuel trims and running lean etc.
Even looking at the values when they where live on the screen, all the demands were being met.
I wasn't sure about the injection timing, don't know what's good and what isn't.
Also couldn't remember if higher or lower lambda was rich / lean.
Lower the decimal, the richer it is. 0.9 is leaner than 0.8 etc.Thanks Dan and Mike.
So nothing's ringing alarm bells on the face of it. It's reassuring that you see it as a strong map and healthy car in general Dan. And yeah that return valve is coping fine
I'm interested to learn a bit more about timing and the AFR.
Well the ignition timing is on the limit hence you have the small amount of timing pull that is optimum for performance. The AFR is leaner than would be ideal at lower RPM as the (standard) fuel pump cannot deliver any more than what is requested. A 'Stage 2+' map would give you a richer AFR at lower RPM as the fuel pressure would be higher, meaning more fuel delivered for the same (or similar) injection time, meaning you keep cylinder temps and EGTs cooler, and can run more ignition timing resulting in more torque/power. You always aim to go richer toward the redline anyway but by higher RPM the injection timing is back to happy levels as there is plenty of fuel available
I'm in two minds at the minute whether to go k03 hybrid/k04, or stick with the k03. The plan, either way, was to stick with the current hardware/software setup for now, and then get the map updated to either 3 or 2+ respectively once I'd got the full works in place hardware wise. Even if I was staying with the k03 I'd like to get an upgraded intercooler and intake before I got the map revised. That's the only reason I'm still on the Stage 2 map, when I should really be on 2+, like you say.
So, would you say getting a 2+ map right now is ideal, rather than essential? And if I were to run the car just as it is for say another 6 months I wouldn't (shouldn't) have any problems?
Post by: fab5freddy on August 27, 2016, 09:37:06 pm
Great news if it was the plug..
Post by: r5gtt on August 27, 2016, 09:47:46 pm
Post by: AJP on August 27, 2016, 09:57:41 pm
So the misfires gone? Did you change the plugs? I read back through the thread but couldn't see if you'd changed them or not..The misfires vanished as of Sunday morning halfway through a long drive (strangely?) and it's still driving nicely. I pulled the plugs on Sunday afternoon and swapped 2 & 3. Plugs all looked spot on incidentally.
Great news if it was the plug..
I do have a set of new plugs if I need them, but figured if it does misfire again and logs the misfire on 3 it would theoretically indicate that same plug being the fault - the misfire code I got was on 2. I would then put the new plugs in with some confidence.
I'm still hesitant to assume it's all fine, as much as the logs show it's running really well at the minute. It's odd that it was so sporadic. Almost like there was some random obstruction to fuel or spark that's come and gone.
Post by: AJP on August 27, 2016, 09:58:42 pm
I think AJP said the misfire miraculously disappeared and hasn't appeared again?.Miraculously is certainly the word!
Post by: r5gtt on August 27, 2016, 10:05:28 pm
You're very lucky :smiley:I think AJP said the misfire miraculously disappeared and hasn't appeared again?.Miraculously is certainly the word!
Post by: AJP on August 27, 2016, 10:08:55 pm
So far mate, so far. I'm driving 200+ miles to the Welsh coast in a week. Can't say I don't have a slight fear in the back of my mind that it's all going to go horribly wrong going over the mountains...!You're very lucky :smiley:I think AJP said the misfire miraculously disappeared and hasn't appeared again?.Miraculously is certainly the word!
Post by: r5gtt on August 27, 2016, 10:11:14 pm
I'll be honest with you and say these vag cars do have intermittent faults that "miraculously" vanish and without a trace as to why it was there in the first place. Hopefully you'll be fine and your car I'll get you there and back without and problems. :happy2:So far mate, so far. I'm driving 200+ miles to the Welsh coast in a week. Can't say I don't have a slight fear in the back of my mind that it's all going to go horribly wrong going over the mountains...!You're very lucky :smiley:I think AJP said the misfire miraculously disappeared and hasn't appeared again?.Miraculously is certainly the word!
Post by: AJP on August 27, 2016, 10:13:31 pm
Cheers mate, fingers crossed. I'm quite looking forward to the drive, once you're up into the hills the roads are incredible, as well as the views.I'll be honest with you and say these vag cars do have intermittent faults that "miraculously" vanish and without a trace as to why it was there in the first place. Hopefully you'll be fine and your car I'll get you there and back without and problems. :happy2:So far mate, so far. I'm driving 200+ miles to the Welsh coast in a week. Can't say I don't have a slight fear in the back of my mind that it's all going to go horribly wrong going over the mountains...!You're very lucky :smiley:I think AJP said the misfire miraculously disappeared and hasn't appeared again?.Miraculously is certainly the word!
Post by: rashg60 on August 27, 2016, 10:20:12 pm
I've just returned from an epic journey to Milton Keynes (for the 40th Anniversary event at VW Headquarters), then onto Devon for a week. Came back via Newbury. Covered just over 700 miles and loved every minute of it. This is certainly the longest journey the car has been in, in my ownership anyway. I normally cover 700 miles in several months!
PS - still not fitted the bumper.......
Post by: r5gtt on August 27, 2016, 10:28:59 pm
Sounds really nice. went to Wales one late night many years ago and it was amazing with long aiding roads up the mountain side. scary though as there was no side barrier so any careless move and its don't the mountain side :scared:Cheers mate, fingers crossed. I'm quite looking forward to the drive, once you're up into the hills the roads are incredible, as well as the views.I'll be honest with you and say these vag cars do have intermittent faults that "miraculously" vanish and without a trace as to why it was there in the first place. Hopefully you'll be fine and your car I'll get you there and back without and problems. :happy2:So far mate, so far. I'm driving 200+ miles to the Welsh coast in a week. Can't say I don't have a slight fear in the back of my mind that it's all going to go horribly wrong going over the mountains...!You're very lucky :smiley:I think AJP said the misfire miraculously disappeared and hasn't appeared again?.Miraculously is certainly the word!
Post by: AJP on August 27, 2016, 10:41:22 pm
Yep, that's exactly what it's like. The road through Welshpool, Newtown, Aberystwyth and down the coast towards Fishguard. If you get it wrong it's game over. But if you get it right it's as good as it gets.Sounds really nice. went to Wales one late night many years ago and it was amazing with long aiding roads up the mountain side. scary though as there was no side barrier so any careless move and its don't the mountain side :scared:Cheers mate, fingers crossed. I'm quite looking forward to the drive, once you're up into the hills the roads are incredible, as well as the views.I'll be honest with you and say these vag cars do have intermittent faults that "miraculously" vanish and without a trace as to why it was there in the first place. Hopefully you'll be fine and your car I'll get you there and back without and problems. :happy2:So far mate, so far. I'm driving 200+ miles to the Welsh coast in a week. Can't say I don't have a slight fear in the back of my mind that it's all going to go horribly wrong going over the mountains...!You're very lucky :smiley:I think AJP said the misfire miraculously disappeared and hasn't appeared again?.Miraculously is certainly the word!
Post by: Dan_FR on August 27, 2016, 11:02:34 pm
Post by: AJP on August 27, 2016, 11:22:08 pm
The Black Mountain Pass is a worthy detour on your way to the coast....I might just look into that Dan... :)
Post by: r5gtt on August 27, 2016, 11:40:49 pm
PS - still not fitted the bumper.......Pull your finger out :P
Post by: r5gtt on August 27, 2016, 11:42:50 pm
Trust me I was shi**** myself as it was pitch black too bmw 320 E reg and I wasn't driving so maybe a good thing too. :phew:Yep, that's exactly what it's like. The road through Welshpool, Newtown, Aberystwyth and down the coast towards Fishguard. If you get it wrong it's game over. But if you get it right it's as good as it gets.Sounds really nice. went to Wales one late night many years ago and it was amazing with long aiding roads up the mountain side. scary though as there was no side barrier so any careless move and its don't the mountain side :scared:Cheers mate, fingers crossed. I'm quite looking forward to the drive, once you're up into the hills the roads are incredible, as well as the views.I'll be honest with you and say these vag cars do have intermittent faults that "miraculously" vanish and without a trace as to why it was there in the first place. Hopefully you'll be fine and your car I'll get you there and back without and problems. :happy2:So far mate, so far. I'm driving 200+ miles to the Welsh coast in a week. Can't say I don't have a slight fear in the back of my mind that it's all going to go horribly wrong going over the mountains...!You're very lucky :smiley:I think AJP said the misfire miraculously disappeared and hasn't appeared again?.Miraculously is certainly the word!
Post by: AJP on August 28, 2016, 04:08:28 pm
This time I did get a code, and the misfire has stayed on cylinder 2. So that rules plugs out in theory.
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fuploads.tapatalk-cdn.com%2F20160828%2Fd372291a43f2330c1bca19d63b554190.jpg&hash=fb5ea4866b55d2e1ee769e869fc1a68137eb476b)
The more I get these misfires the more I'm starting to recognise a pattern: WOT in 3rd at 2500-3500rpm 'triggers' it. I reckon if I never used full throttle I'd never get this misfire.
Anyway, the misfire seemed to ease somewhat, then I parked up for 5 minutes, tried again, and the misfire was gone.
I'm a bit p*ssed off that it didn't miss a beat with you @Tfsi_Mike. It's all quite perplexing. So, the drama continues. I can at least now rule out both plugs and coils, but I was pretty sure that was the case anyway.
Post by: AJP on August 28, 2016, 04:31:43 pm
Also, remembering an earlier post on this thread I attempted 'driving through' the misfires, so pushed to full throttle on boost, and at one point the misfire was quite severe and I heard a metallic clink from the engine that coincided exactly with the misfire. It really didn't sound healthy, so I didn't attempt to drive through the misfires again..
Post by: AJP on August 28, 2016, 04:35:05 pm
Glad to hear things have finally been sorted for you mate. Fingers crossed it stays that way.Thanks mate, although as you'll see from my latest update the gremlins have returned.
I've just returned from an epic journey to Milton Keynes (for the 40th Anniversary event at VW Headquarters), then onto Devon for a week. Came back via Newbury. Covered just over 700 miles and loved every minute of it. This is certainly the longest journey the car has been in, in my ownership anyway. I normally cover 700 miles in several months!
PS - still not fitted the bumper.......
Your car certainly felt strong and healthy to me Rash. And it will have done it good to get up to temperature for a while.
All in good time with the bumper. It's only cosmetic so you have the luxury of being able to do things at your own pace. It'll be worth the wait!
Post by: r5gtt on August 28, 2016, 05:23:32 pm
Post by: AJP on August 28, 2016, 05:39:26 pm
Bloody heck man thought you were getting some where ans bang it's back to bite you in a butt. :thinking: I know you say misfire on cylinder two so maybe it is the injector after all.I know, it's getting silly now. Why couldn't it do this when Mike did the logging with me two days ago? WHY?!
Yeah if I had to guess I'd say injector. Would a knackered injector be obvious to the eye once it's removed? I'm guessing it'd need the spray testing to come to any sort of conclusion. But an intermittently failing injector, I'm not sure.
At least I've got it booked in, even though it's a few weeks away I'm confident Steve will at the very least diagnose it. If it means the injector needs replacing then so be it. Just want the bloody thing sorted.
Post by: r5gtt on August 28, 2016, 05:51:16 pm
Let's just hope it's nothing worse than an injector as it's an intermittent misfire and possibly that injector is clogged up and if the inlet comes off you may as well get the head decoked whilst there :happy2: get it all done so no messing around.
Post by: AJP on August 28, 2016, 06:14:26 pm
That's why you should have bought the set of s3 ones that would have sorted you out but now you'll have to fork out full price just for one :slap: you never listen do you :signLOL:I don't think it'd be a case of just dropping in a set of k04 injectors. The map would have to be rewritten. Standard injectors are fine up to about 360bhp as you know (assuming they're not faulty)
Let's just hope it's nothing worse than an injector as it's an intermittent misfire and possibly that injector is clogged up and if the inlet comes off you may as well get the head decoked whilst there :happy2: get it all done so no messing around.
Post by: r5gtt on August 28, 2016, 07:11:14 pm
Definitely need rewritting the map as ive found with the rs4 injectors on someone else's tfsi.That's why you should have bought the set of s3 ones that would have sorted you out but now you'll have to fork out full price just for one :slap: you never listen do you :signLOL:I don't think it'd be a case of just dropping in a set of k04 injectors. The map would have to be rewritten. Standard injectors are fine up to about 360bhp as you know (assuming they're not faulty)
Let's just hope it's nothing worse than an injector as it's an intermittent misfire and possibly that injector is clogged up and if the inlet comes off you may as well get the head decoked whilst there :happy2: get it all done so no messing around.
What I meant was you'd have a set for the price of one :P
Post by: r5gtt on August 29, 2016, 03:00:58 pm
http://pages.ebay.com/link/?nav=item.view&id=371649669341&alt=web
Post by: AJP on August 29, 2016, 03:39:19 pm
Want to share this with you.Hmm, interesting. Thanks for that mate. I wonder if there's any value in getting these refurbed. Might be a better approach to replacing odd injectors and pretty much waiting for the next to fail, and it'd in theory be as good as 4 new injectors. Not sure on prices for refurb. Will have a read up.
http://pages.ebay.com/link/?nav=item.view&id=371649669341&alt=web
Of course, it's a bit of a punt to assume it is the injector causing the misfires, although it seems much more likely to be that than anything else at this stage.
Post by: AJP on August 29, 2016, 04:25:49 pm
I'm seriously considering this. But... I don't really want to shell out for the injectors and refurb if it turns out to be something else! I've no real way of finding out the cause until the car goes in to Statller in 4 weeks.
Not sure what to do.
Post by: r5gtt on August 29, 2016, 04:31:32 pm
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fi1374.photobucket.com%2Falbums%2Fag433%2FSandy1786%2FMobile%2520Uploads%2F20160829_010329.jpg&hash=fd23a7aead7c727913c5fa4cbbcb48d8ee467ded)
Post by: r5gtt on August 29, 2016, 04:33:24 pm
If you're really thinking of refurbishing them then maybe better off buying a new set as I don't think it will be cheap tbh.Want to share this with you.Hmm, interesting. Thanks for that mate. I wonder if there's any value in getting these refurbed. Might be a better approach to replacing odd injectors and pretty much waiting for the next to fail, and it'd in theory be as good as 4 new injectors. Not sure on prices for refurb. Will have a read up.
http://pages.ebay.com/link/?nav=item.view&id=371649669341&alt=web
Of course, it's a bit of a punt to assume it is the injector causing the misfires, although it seems much more likely to be that than anything else at this stage.
Post by: AJP on August 29, 2016, 04:37:07 pm
Surprisingly, it's not too bad. About 60 quid for a set of four, unless I'm missing something. If you go on the website it tells you the process, and it seems to go a fair bit further than just ultrasonic cleaning.If you're really thinking of refurbishing them then maybe better off buying a new set as I don't think it will be cheap tbh.Want to share this with you.Hmm, interesting. Thanks for that mate. I wonder if there's any value in getting these refurbed. Might be a better approach to replacing odd injectors and pretty much waiting for the next to fail, and it'd in theory be as good as 4 new injectors. Not sure on prices for refurb. Will have a read up.
http://pages.ebay.com/link/?nav=item.view&id=371649669341&alt=web
Of course, it's a bit of a punt to assume it is the injector causing the misfires, although it seems much more likely to be that than anything else at this stage.
Considering the price of a new injector, this option is miles cheaper.
Post by: AJP on August 29, 2016, 04:41:44 pm
Post by: Tfsi_Mike on August 29, 2016, 05:12:40 pm
Post by: AJP on August 29, 2016, 05:19:27 pm
Is that at mr injector?Different firm I think Mike, but I have heard of mr injector - can you recommend them?
Post by: Tfsi_Mike on August 29, 2016, 05:25:51 pm
Post by: AJP on August 29, 2016, 05:29:19 pm
Alex uses them, I believe. I'm sure mine went there for checkingThanks mate. I'll check them out
Post by: r5gtt on August 30, 2016, 12:41:03 am
Sounds a fair price :happy2: maybe choose that option over new :grin:Surprisingly, it's not too bad. About 60 quid for a set of four, unless I'm missing something. If you go on the website it tells you the process, and it seems to go a fair bit further than just ultrasonic cleaning.If you're really thinking of refurbishing them then maybe better off buying a new set as I don't think it will be cheap tbh.Want to share this with you.Hmm, interesting. Thanks for that mate. I wonder if there's any value in getting these refurbed. Might be a better approach to replacing odd injectors and pretty much waiting for the next to fail, and it'd in theory be as good as 4 new injectors. Not sure on prices for refurb. Will have a read up.
http://pages.ebay.com/link/?nav=item.view&id=371649669341&alt=web
Of course, it's a bit of a punt to assume it is the injector causing the misfires, although it seems much more likely to be that than anything else at this stage.
Considering the price of a new injector, this option is miles cheaper.
Post by: pudding on August 30, 2016, 01:27:27 pm
Bloody heck man thought you were getting some where ans bang it's back to bite you in a butt. :thinking: I know you say misfire on cylinder two so maybe it is the injector after all.I know, it's getting silly now. Why couldn't it do this when Mike did the logging with me two days ago? WHY?!
Yeah if I had to guess I'd say injector. Would a knackered injector be obvious to the eye once it's removed? I'm guessing it'd need the spray testing to come to any sort of conclusion. But an intermittently failing injector, I'm not sure.
At least I've got it booked in, even though it's a few weeks away I'm confident Steve will at the very least diagnose it. If it means the injector needs replacing then so be it. Just want the bloody thing sorted.
Nope, not obvious. The nozzle on mine wasn't clogged at all. Looked identical to the other 3 which worked fine. I think something internal just wears out on them over time.
It's certainly looking like it's the cause. Holding back in boost is usually always a sign of insufficient fuel, and that clanking noise was detonation, so be very careful until you get this sorted.
Post by: AJP on August 30, 2016, 02:01:39 pm
Thanks mate. I'm hoping to catch up with Steve again soon, see what he thinks about the idea of getting a full set of refurbed injectors in.Bloody heck man thought you were getting some where ans bang it's back to bite you in a butt. :thinking: I know you say misfire on cylinder two so maybe it is the injector after all.I know, it's getting silly now. Why couldn't it do this when Mike did the logging with me two days ago? WHY?!
Yeah if I had to guess I'd say injector. Would a knackered injector be obvious to the eye once it's removed? I'm guessing it'd need the spray testing to come to any sort of conclusion. But an intermittently failing injector, I'm not sure.
At least I've got it booked in, even though it's a few weeks away I'm confident Steve will at the very least diagnose it. If it means the injector needs replacing then so be it. Just want the bloody thing sorted.
Nope, not obvious. The nozzle on mine wasn't clogged at all. Looked identical to the other 3 which worked fine. I think something internal just wears out on them over time.
It's certainly looking like it's the cause. Holding back in boost is usually always a sign of insufficient fuel, and that clanking noise was detonation, so be very careful until you get this sorted.
I've decided not to do the trip to Wales, there just seems like too much to risk, and it buys me a bit of time. Which is a shame because the weather should have been good; the next I can get down is October and it starts getting a bit fresh on the coast!
Anyway, no misfires today.
Post by: pudding on August 30, 2016, 04:22:55 pm
Thanks mate. I'm hoping to catch up with Steve again soon, see what he thinks about the idea of getting a full set of refurbed injectors in.Bloody heck man thought you were getting some where ans bang it's back to bite you in a butt. :thinking: I know you say misfire on cylinder two so maybe it is the injector after all.I know, it's getting silly now. Why couldn't it do this when Mike did the logging with me two days ago? WHY?!
Yeah if I had to guess I'd say injector. Would a knackered injector be obvious to the eye once it's removed? I'm guessing it'd need the spray testing to come to any sort of conclusion. But an intermittently failing injector, I'm not sure.
At least I've got it booked in, even though it's a few weeks away I'm confident Steve will at the very least diagnose it. If it means the injector needs replacing then so be it. Just want the bloody thing sorted.
Nope, not obvious. The nozzle on mine wasn't clogged at all. Looked identical to the other 3 which worked fine. I think something internal just wears out on them over time.
It's certainly looking like it's the cause. Holding back in boost is usually always a sign of insufficient fuel, and that clanking noise was detonation, so be very careful until you get this sorted.
I've decided not to do the trip to Wales, there just seems like too much to risk, and it buys me a bit of time. Which is a shame because the weather should have been good; the next I can get down is October and it starts getting a bit fresh on the coast!
Anyway, no misfires today.
Yeah it's a bit risky! The most damaging detonation can't usually be heard because it's higher up the revs, and then it's usually too late. It would be better if the injector failed completely because no fuel = nothing to burn and therefore no det. But they kind of half work and cause a very lean burn, which is dangerous to your engine's health!
Given how common this problem is, I'd definitely be sticking some new ones or refurbed ones in asap!
Post by: AJP on August 30, 2016, 04:30:14 pm
I've now got a used set on the way which I'll be getting refurbished by mrinjector.co.uk - just waiting for a reply from him as he's closed til 31st. They will be going in when I'm at Statller at the end of September.Thanks mate. I'm hoping to catch up with Steve again soon, see what he thinks about the idea of getting a full set of refurbed injectors in.Bloody heck man thought you were getting some where ans bang it's back to bite you in a butt. :thinking: I know you say misfire on cylinder two so maybe it is the injector after all.I know, it's getting silly now. Why couldn't it do this when Mike did the logging with me two days ago? WHY?!
Yeah if I had to guess I'd say injector. Would a knackered injector be obvious to the eye once it's removed? I'm guessing it'd need the spray testing to come to any sort of conclusion. But an intermittently failing injector, I'm not sure.
At least I've got it booked in, even though it's a few weeks away I'm confident Steve will at the very least diagnose it. If it means the injector needs replacing then so be it. Just want the bloody thing sorted.
Nope, not obvious. The nozzle on mine wasn't clogged at all. Looked identical to the other 3 which worked fine. I think something internal just wears out on them over time.
It's certainly looking like it's the cause. Holding back in boost is usually always a sign of insufficient fuel, and that clanking noise was detonation, so be very careful until you get this sorted.
I've decided not to do the trip to Wales, there just seems like too much to risk, and it buys me a bit of time. Which is a shame because the weather should have been good; the next I can get down is October and it starts getting a bit fresh on the coast!
Anyway, no misfires today.
Yeah it's a bit risky! The most damaging detonation can't usually be heard because it's higher up the revs, and then it's usually too late. It would be better if the injector failed completely because no fuel = nothing to burn and therefore no det. But they kind of half work and cause a very lean burn, which is dangerous to your engine's health!
Given how common this problem is, I'd definitely be sticking some new ones or refurbed ones in asap!
I've also spoken to Steve and emailed him the data logs. I don't know if he'll see anything suspect there as the car was running spot on when we did the logs.
So, there's a bit of a wait til I get the injectors in but at least then I can in theory rule out plugs, coils and injectors. From then it's a case of fingers crossed. Any more misfires could point to something much more expensive. Although the compression is good across all 4 so I'm quietly confident.
Post by: AJP on September 01, 2016, 11:42:24 am
However...
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fuploads.tapatalk-cdn.com%2F20160901%2F135fecaaa36349a14974d1c0623fade2.jpg&hash=2374153a437a764499648861aeb73c89bbdc496f)
Two have a domed nozzle, two don't. That's surely not right is it?! Got a feeling I might be sending these back.
Post by: Tfsi_Mike on September 01, 2016, 12:49:51 pm
Ill get you a pic of the one that came out cyl 3 on mine later. Almost certain they should match?
Post by: AJP on September 01, 2016, 01:01:53 pm
That'd be a big help Mike, thanks. I could also do with knowing the number on yours that starts 0261500.
Ill get you a pic of the one that came out cyl 3 on mine later. Almost certain they should match?
And yes, they're not a matching set. Confirmed by Mr Injector himself earlier today!
Post by: Tfsi_Mike on September 01, 2016, 01:10:39 pm
Post by: AJP on September 01, 2016, 02:03:36 pm
Gimme a text in a bit to remind me.Will do
Post by: r5gtt on September 01, 2016, 05:40:47 pm
Right, received that set of 4 injectors off ebay today.That looks melted or something similar :thinking:
However...
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fuploads.tapatalk-cdn.com%2F20160901%2F135fecaaa36349a14974d1c0623fade2.jpg&hash=2374153a437a764499648861aeb73c89bbdc496f)
Two have a domed nozzle, two don't. That's surely not right is it?! Got a feeling I might be sending these back.
Post by: AJP on September 01, 2016, 05:47:32 pm
Two different injectors mateRight, received that set of 4 injectors off ebay today.That looks melted or something similar :thinking:
However...
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fuploads.tapatalk-cdn.com%2F20160901%2F135fecaaa36349a14974d1c0623fade2.jpg&hash=2374153a437a764499648861aeb73c89bbdc496f)
Two have a domed nozzle, two don't. That's surely not right is it?! Got a feeling I might be sending these back.
I couldn't decipher any numbers stamped on them (maybe suspiciously?) but if and when I do I'm expecting them to differ.
I think the correct Bosch number for the injector is 0261500020. VW number 06F906036A. Just seeing if Mike (or anyone else?) can confirm this and whether this injector has the little domed nozzle.
But yeah, I will be contacting the seller soon!
Post by: r5gtt on September 01, 2016, 05:57:22 pm
Maybe they have two different types in our cars?. no?
quite weird though :thinking:
Post by: AJP on September 01, 2016, 07:10:31 pm
Bloody heck what a headache buying stuff :doh:Well after a bit of a closer look, the part numbers are illegible on all but one injector, where I can read 06F906036A and 0261500020. This is one of the two domed injectors (which I expect Mike will confirm is the correct type).
Maybe they have two different types in our cars?. no?
quite weird though :thinking:
On one of the other two, I can just make out some faint lettering. And it says.......... 1J0. Unbelievable!
Post by: AJP on September 01, 2016, 07:48:03 pm
Post by: r5gtt on September 01, 2016, 09:37:44 pm
oh crappers AJP that's mental, where dyou get um from?.Bloody heck what a headache buying stuff :doh:Well after a bit of a closer look, the part numbers are illegible on all but one injector, where I can read 06F906036A and 0261500020. This is one of the two domed injectors (which I expect Mike will confirm is the correct type).
Maybe they have two different types in our cars?. no?
quite weird though :thinking:
On one of the other two, I can just make out some faint lettering. And it says.......... 1J0. Unbelievable!
Post by: AJP on September 01, 2016, 09:41:53 pm
It's those on ebay that you linked tooh crappers AJP that's mental, where dyou get um from?.Bloody heck what a headache buying stuff :doh:Well after a bit of a closer look, the part numbers are illegible on all but one injector, where I can read 06F906036A and 0261500020. This is one of the two domed injectors (which I expect Mike will confirm is the correct type).
Maybe they have two different types in our cars?. no?
quite weird though :thinking:
On one of the other two, I can just make out some faint lettering. And it says.......... 1J0. Unbelievable!
He got straight back to me anyway, seems sound about it. I tried to emphasise the fact that part numbers are somewhat crucial with injectors...!
I expect a reply from him tomorrow.
Post by: r5gtt on September 02, 2016, 09:26:31 am
Post by: Dan_FR on September 02, 2016, 11:34:35 am
Post by: AJP on September 02, 2016, 01:13:38 pm
Haven't you already had a new one recently? Why not just buy 3 new injectors and be done with it? Especially when they are so prone to failingIt was a used one that went in Dan. As far as I know new injectors are £100+ each??
Post by: r5gtt on September 02, 2016, 04:03:41 pm
Post by: AJP on September 03, 2016, 09:27:08 am
I told you S3 ones :slap: :signLOL:Shush
Post by: r5gtt on September 03, 2016, 09:38:28 am
:PI told you S3 ones :slap: :signLOL:Shush
Post by: AJP on October 02, 2016, 03:11:51 pm
After fannying around getting refunded for the mismatched ebay injectors, I went to pick up a set in person from a local VAG breakers. They initially wanted 120 quid but I got them for 80.
I sent these to Steve Biggs aka Mr Injector (not sure if he's any relation to Ronnie) on the back of @Tfsi_Mike's advice. A shade over 100 quid and a few days later I received my refurbed injectors complete with new seals and a data sheet showing before and after flow. Job's a good un.
I got these fitted at Statller along with an RS4 fuel return valve (made sense to stick one in while the inlet mani was off as I'll be going k04 in the future).
So, after six days of varied driving all seems well. Although I'm not taking the absence of misfires as proof of the fix (being so sporadic anyway) there are a couple of improvements I've noticed. One is that the car turns over in the morning with much less drama; it wasn't terrible before but it did cough into life a little bit on a cold engine. This could indicate that an injector that was causing the misfire might also have been causing a slightly rough startup. The other is that the tinkling/jangling noise I assumed was a loose wastegate is now gone. Apparently this could have been caused by the standard return valve. Who knows. But it's gone.
Big trip to Wales is now back on in a week, so I'll have a good few more miles of 'testing' (mega Welsh B-road fun) complete.
Fingers crossed.
Post by: r5gtt on October 02, 2016, 03:22:00 pm
Post by: AJP on October 02, 2016, 03:27:12 pm
at least seems to be looking good so hopefully all is well and no more issues now :smiley:Cheers dude, yeah it's just a case of keeping an eye on things now. I've given it the beans on a few occasions to try and emulate the conditions that it misfired under before, and it just boosts hard and takes off without drama. Here's hoping we're all sorted.
Post by: r5gtt on October 02, 2016, 04:27:18 pm
I can't wait to get my car back if at all so I can carry on with all the craziness I started but no idea how long these claims people are going to prolong the claim as the longer they delay thr more ££££ in their pockets.
Post by: AJP on October 02, 2016, 04:53:16 pm
I reckon you've hit the jackpot and you'll be fine now mate :jumping:Yeah my problems certainly pale in comparison to yours. Must be soul destroying
I can't wait to get my car back if at all so I can carry on with all the craziness I started but no idea how long these claims people are going to prolong the claim as the longer they delay thr more ££££ in their pockets.
Guess you've just got to cling on and bite your lip til it's reached a conclusion. Just think though, once it's all sorted you'll be able to jump right back on the mod wagon and build that Stage 2+ beast!
Trust me on this, if you're used to stock power you'll be in absolutely in love with a good 2+ setup. I bet your old TT was quick, but the differences between a tuned k03/k03s 1.8T and a tuned k03 TFSI are really quite noticeable. The TFSI feels so much stronger. I went round Oulton Park in a k04 engined (BAM) mk1 Octavia track car a while ago, running 280ish, and it was much more comparable in terms of grunt to my GTI than any k03/k03s 1.8T car I've owned or driven in the past. And I'm still on a Stage 2 map.
Hang on in there mate, it'll be worth the hassle in the end!
Post by: r5gtt on October 02, 2016, 05:30:25 pm
just got to see what the engineer says re repairs or write off and I repair as I'll do a better job of repairing my own car and will do it properly. once front end is off do al the trimmings in the bay rip the inlet off and whack the RS4 fpv in along with inlet clean RFD and off we go. :grin:
Post by: AJP on October 02, 2016, 06:01:28 pm
Tbh with you my tt was quick but the reason I've jumped on the tfsi mod route is because I know 280bhp will be a lot more stronger than the tt's 265bhp as I won't be dragging around a quattro diff which made the tt lose at least 20hp if not more.I might do the runner flap delete when I go k04. Only thing making me 50/50 on it is apparently it can make it a bit less perky off boost and cold starts can be rough. But on the plus side you get better flow and more pops and bangs (gotta be worth it for that alone!)
just got to see what the engineer says re repairs or write off and I repair as I'll do a better job of repairing my own car and will do it properly. once front end is off do al the trimmings in the bay rip the inlet off and whack the RS4 fpv in along with inlet clean RFD and off we go. :grin:
It's the torque that makes the difference with a TFSI (with one of Niki's maps at least). Mine dynoed at 345lb/ft on the Stage 2 map, and since fitting the Loba it feels even stronger. If I got the map revised I wouldn't be surprised to see 360lb/ft. From a little k03! Not bothering with a 2+ map though, the next time I'm in Hinckley there will be a k04 or k03 hybrid bolted on ready for Stage 3...
Post by: r5gtt on October 02, 2016, 06:21:42 pm
from what Niki says thr RFD is a great mod and as you also said if it's Niki mapping the car jobs a good un and I doubt I'd even noticed a little less off thr mark take off since the wheels spin off on hard take off.
345lb/ft is a lot of torque mate and I'm sure if you went back now and got the tweak map you'd see better results as the fpv wasn't fitted att of stage 2 and did you say loba?. oR was that done before mapping?
Post by: AJP on October 02, 2016, 06:32:51 pm
lol I was ready to go k03 hybrid thr other month but someone stopped me from doing so but at 550 it wasn't a bad deal and I have most of thr other stuff ready for stage 3 if I wanted but remembering the wheel spins I got scared and backed off otherwise I'd have a loba k03 hybrid sitting in my storage closet along with all the other goodies :signLOL:Yep, the 345lb/ft was Stage 2 on the standard pump. I fitted the Loba pump after the map, to cure the fuel cuts I was getting. It definitely feels stronger now. Not sure how much benefit the RS4 valve is at this point but it'll certainly play a part once I'm into the 300s.
from what Niki says thr RFD is a great mod and as you also said if it's Niki mapping the car jobs a good un and I doubt I'd even noticed a little less off thr mark take off since the wheels spin off on hard take off.
345lb/ft is a lot of torque mate and I'm sure if you went back now and got the tweak map you'd see better results as the fpv wasn't fitted att of stage 2 and did you say loba?. oR was that done before mapping?
That Loba hybrid - was that Dan Smith's? I was so close to buying that myself! Good thing about the hybrids is that Niki can map them on k03 injectors, so the refurbed set I've just put in should be good for whatever direction I take. If they can support a BBT k03 hybrid at 360bhp I'd imagine they'd be good for a k04 too. I'm going to speak to Niki about that, and if he says you need k04 injectors for a k04 I'll just go down the k03 hybrid route.
Got tyres and a CV boot to sort this week, then I'll get the Clubsport brakes on. Back on track for power after that.
Post by: r5gtt on October 02, 2016, 06:46:35 pm
Did have an issue with surges on take off after fitting the VIS but been told it's the sensor which fabfreddy has kindly given me foc :smiley: :smiley: will fit up everything once car is back and race to r-tech for my maps.
No it was someone else on eBay fb that was selling his as he moved on to the BBT I think. I think I should have bought it now as the cars been hit so no chance of selling it on for a few years.
Post by: AJP on October 10, 2016, 06:44:11 pm
It misfired once. Going from 3rd to 4th. Changed up at about 6k, then as soon as I was back on the (full) throttle in 4th... brrrrrapp. Then it just carried on as if nothing had happened.
Odd. It's better than before, by a long way. Just not sure what to make of it. Suppose I can live with it if it only spits its dummy out for one second out of weeks of driving!
Post by: r5gtt on October 10, 2016, 07:12:46 pm
one little hick up isn't much to worry about as long as it's not a constant misfire but there's probably that little worry at the back of your head that something could go wrong at anytime :thinking: hopefully not :smiley:
Post by: AJP on October 10, 2016, 07:29:26 pm
I think the fact that it's so sporadic basically limits me to the process of elimination. I can't log a problem that seldom occurs. At this point, the low pressure pump and software are the two candidates. I don't want to be the guy that says his R-Tech map is a bit 'off' but I suppose it's possible. Unlikely, but possible.
I might uprate the low pressure pump when I go k04. As well as a few other things not on the usual list. As for the map... hmmm.
Post by: r5gtt on October 10, 2016, 07:36:33 pm
Also the lpfp could be a candidate as you say but I'd say if it were that it'd be more constant but I'm no guru :stupid: :signLOL:
Post by: AJP on October 12, 2016, 05:03:30 pm
Stunning part of the world anyway. I'll live there one day hopefully.
Post by: r5gtt on October 12, 2016, 07:00:55 pm
Post by: AJP on November 17, 2016, 07:18:39 pm
The 'new' misfire I reported back on 10th October has now occured at least three times - in the exact same circumstances. Going from 3rd to 4th at full chat, as soon as the throttle's down in 4th it's like hitting a brick wall. Complete loss of power for a split second with a big brrapp from the exhaust. Then all's fine, like nothing happened. It's quite puzzling.
Answers on a postcard.
Post by: pudding on November 17, 2016, 07:28:28 pm
Either that or something is amiss and the ECU is pulling back. Over boosting maybe? Anything revealing in the logs? As always, best to use VCDS in turbo mode.
Post by: AJP on November 17, 2016, 07:47:24 pm
Sounds like a momentary lean condition. The transient fuel demand when flooring it after a gear change can be pretty huge.Did some logs a while ago before the refurbed injectors went in (and the misfire was really bad) and the car behaved itself so left us clueless.
Either that or something is amiss and the ECU is pulling back. Over boosting maybe? Anything revealing in the logs? As always, best to use VCDS in turbo mode.
Since fitting the injectors it's like a different car... apart from this very rare but specific hiccup which manifested after the injectors went in.
I don't have VCDS, and even if I did I'd be waiting weeks or months for it to happen again. It seldom happens. I don't know if the fact I'm still on a Stage 2 map but with a Loba pump has any bearing on it, but logic tells me that if anything I should have more fuel headroom than if I was on 2+, so I doubt that.
I know I'm just guessing without doing more logging though. Although if it was momentarily overboosting like you suggest then it might have stored a code.
Post by: r5gtt on November 17, 2016, 08:44:24 pm
Have you checked your fuel pressure sensor?
Post by: AJP on November 17, 2016, 08:51:36 pm
Oh dear :doh: back again :thinking:Haven't really checked anything yet. I'll start by seeing if there are any codes stored and go from there. It'll be going in for the mk7 brakes soon so I'll get it scanned while it's in.
Have you checked your fuel pressure sensor?
Post by: r5gtt on November 17, 2016, 09:00:10 pm
Post by: AJP on November 17, 2016, 09:28:18 pm
Pain in the butt I bet. Mk7 brakes noce what discs and pads you going with?.Pagid 340mm discs and probably DS2500 pads. Got some braided lines on the way from AKS so I'm just waiting to see if any Black Friday deals come up on pads.
The calipers have been sat in a box for months, it's about time they actually went on the car!
Post by: r5gtt on November 17, 2016, 09:39:04 pm
Yeah I'm waiting for next week Friday too as I need some pads for my Porsche 911 turbo calipers.
I have the same discs :happy2:
Post by: AJP on November 17, 2016, 09:44:44 pm
Yeah I remember when you mentioned the calipers :signLOL:Let me know if you hear of any deals!
Yeah I'm waiting for next week Friday too as I need some pads for my Porsche 911 turbo calipers.
I have the same discs :happy2:
Post by: r5gtt on November 17, 2016, 10:13:38 pm
will do :happy2:Yeah I remember when you mentioned the calipers :signLOL:Let me know if you hear of any deals!
Yeah I'm waiting for next week Friday too as I need some pads for my Porsche 911 turbo calipers.
I have the same discs :happy2:
Post by: pudding on November 18, 2016, 04:42:48 pm
Sounds like a momentary lean condition. The transient fuel demand when flooring it after a gear change can be pretty huge.Did some logs a while ago before the refurbed injectors went in (and the misfire was really bad) and the car behaved itself so left us clueless.
Either that or something is amiss and the ECU is pulling back. Over boosting maybe? Anything revealing in the logs? As always, best to use VCDS in turbo mode.
Since fitting the injectors it's like a different car... apart from this very rare but specific hiccup which manifested after the injectors went in.
I don't have VCDS, and even if I did I'd be waiting weeks or months for it to happen again. It seldom happens. I don't know if the fact I'm still on a Stage 2 map but with a Loba pump has any bearing on it, but logic tells me that if anything I should have more fuel headroom than if I was on 2+, so I doubt that.
I know I'm just guessing without doing more logging though. Although if it was momentarily overboosting like you suggest then it might have stored a code.
Not always. An event the ECU doesn't like needs to happen a bunch of times before it logs it as a fault. Unless of course it's a wiring/sensor fault, then it's logged immediately.
When I was fitting my downpipe, I'd disconnected the battery. So the first few times I went into boost again afterwards, the ECU majorly threw a fit and pulled it back.....like hitting a wall as you say. A big time overboost as it felt way quicker than usual before the ECU pooped the party. No fault codes! It's been fine ever since it's relearned and sorted itself out.
Occasionally I'll get a stutter in 6th when flooring it from 2500rpm after a period of cruising. Pretty sure it's not coils or injectors as they were new not long ago. Standard car didn't do it, so it could be a glitch in the map for that specific load scenario. I've been meaning to get to my mapper for ages, just can't find the time!
A dyno might be the only way to troubleshoot it. Nothing was spotted during your mapping?
Post by: AJP on November 18, 2016, 05:30:01 pm
Yep that's why I said 'might' as it's happened a few times now so could be enough to store a code, although it's a bit optimistic. Live logging while it misfires would be ideal but it's not the most convenient thing.Sounds like a momentary lean condition. The transient fuel demand when flooring it after a gear change can be pretty huge.Did some logs a while ago before the refurbed injectors went in (and the misfire was really bad) and the car behaved itself so left us clueless.
Either that or something is amiss and the ECU is pulling back. Over boosting maybe? Anything revealing in the logs? As always, best to use VCDS in turbo mode.
Since fitting the injectors it's like a different car... apart from this very rare but specific hiccup which manifested after the injectors went in.
I don't have VCDS, and even if I did I'd be waiting weeks or months for it to happen again. It seldom happens. I don't know if the fact I'm still on a Stage 2 map but with a Loba pump has any bearing on it, but logic tells me that if anything I should have more fuel headroom than if I was on 2+, so I doubt that.
I know I'm just guessing without doing more logging though. Although if it was momentarily overboosting like you suggest then it might have stored a code.
Not always. An event the ECU doesn't like needs to happen a bunch of times before it logs it as a fault. Unless of course it's a wiring/sensor fault, then it's logged immediately.
When I was fitting my downpipe, I'd disconnected the battery. So the first few times I went into boost again afterwards, the ECU majorly threw a fit and pulled it back.....like hitting a wall as you say. A big time overboost as it felt way quicker than usual before the ECU pooped the party. No fault codes! It's been fine ever since it's relearned and sorted itself out.
Occasionally I'll get a stutter in 6th when flooring it from 2500rpm after a period of cruising. Pretty sure it's not coils or injectors as they were new not long ago. Standard car didn't do it, so it could be a glitch in the map for that specific load scenario. I've been meaning to get to my mapper for ages, just can't find the time!
A dyno might be the only way to troubleshoot it. Nothing was spotted during your mapping?
Mapping was fine, the only comment from Niki was that it was struggling a bit for fuel in the midrange. I subsequently got some fuel cuts, as expected, then fit the Loba pump which sorted that. Then came the really bad misfires under load which were eventually sorted with refurbed injectors (initial change to new coils and plugs didn't work). Things have largely been fine since then except for this one little hiccup going from 3rd to 4th.
I should really be on a 2+ map by now but the way I see it the car should have plenty of headroom running mostly 2+ hardware on a Stage 2 map. I'd expect problems if it was the other way round.
Steve at Statller did say the map was "pushing a lot of timing" or words to that effect. I'm not sure if that was deduced by the logs I sent him in the summer or just by driving it.
The only reason I haven't gone down to Hinckley for the 2+ update is that I'm hopefully going k04 soon, so it'd be pointless.
Post by: kuriisenbo on December 09, 2020, 09:40:33 am
Post by: ClaireSuther on December 09, 2020, 10:31:10 am
Post by: pudding on December 12, 2020, 05:28:53 pm
I should have never bought this car, it has too many issues for my liking.
Well that's a chunky dose of controversy to drop into a 4 year old thread. Care to elaborate?
Such defeatism these days when it comes to cars. Looked after GTIs have very few show stopping issues. Name me a car, ANY car, that has zero issues?
I know of 200,000+ mile GTis and Edition 30s still going strong with no major repair work, just maintenance. I don't consider that a bad result for the world's first mass produced DI petrol engine.
Maybe you would like an electric car which has one or two moving parts.